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Uncover the hidden clauses in Andrew Carnegie's secret dossier that threaten to unravel the Peace Palace's legacy. Decipher codes across diplomatic landmarks to expose a conspiracy sabotaging global peace.
📱 1 to 10 phones · 1 team per phone · Independent codes
In 1903, steel magnate Andrew Carnegie donated $1
You are an American diplomatic attaché, on a confidential mission in Zuid-Holland in 1913.
You arrive at Carnegieplein, before the new Peace Palace, inaugurated on September 18
Dive into the most secret diplomatic investigation of 1913, when Andrew Carnegie funded the first international tribunal in History in the heart of The Hague.
You're not just buying an escape game. You're carrying a living guide — historical anecdotes, forgotten legends, key monuments, hidden architecture — unfolding as you go.
At each stop, places ordinary guides miss — secret façades, sculpted crests, alleys steeped in history.
Every riddle is rooted in a real historical fact or local legend. You leave with dozens of stories to tell.
Learn to read buildings — flamboyant Gothic, Baroque, Art Deco — like a real art historian, while having fun.
Walk through the city like a novel's character — every alley becomes a stage, every square a theatre.
A voice walks with you at every step, tells the story of each place, reads clues, adds a cinematic feel.
Keep access to the guide & game for 1 year. Come back any time, share it with friends.
« You will not leave this city the way you entered it. »
Explore the city on foot solving puzzles based on real historical facts. No locked room — the city is your playground.
No app to download. Play directly from your browser. Guided step by step, at your own pace.
One purchase per phone is enough. Play with family, friends or as a couple — everyone participates.
Point your phone at the façade: a historical character appears and speaks to you in your language. Golden letters magically write themselves on the wall to reveal the puzzle answer.
Stuck? Progressive personalised hints. The character repeats the puzzle on demand — at your own pace.
French, English, German, Spanish, Italian + 27 other languages auto-translated by AI.
Places tied to your adventure — optional entries, totally up to you · per person
« Peace through Law »— Official motto of the Vredespaleis / Peace Palace, established 1913
Carnegieplein welcomes you to The Hague's diplomatic quarter, the nerve center of international institutions since 1913. This square bears the name of Andrew Carnegie, the Scottish-American steel magnate who revolutionized global philanthropy. Born in 1835 to a working-class Scottish family, Carnegie built an industrial empire before devoting his fortune to education and world peace. His donation of $1.8 million USD for the Vredespaleis represented a colossal sum then, equivalent to more than 50 million euros today. You discover the first traces of this pacifist ambition that would transform The Hague into the world capital of international arbitration.
The Vredespaleis stands before you, Louis-Marie Cordonnier's masterpiece inaugurated on September 18, 1913, by Queen Wilhelmine of the Netherlands. This French architect, designer of the Lille Opera, blended Beaux-Arts style with Renaissance influences to create this temple of international justice. Since 1946, the building has housed the International Court of Justice, direct heir to the First Hague Peace Conference of 1899 that brought together more than 100 delegates from 26 nations. This first conference, initiated by Tsar Nicholas II of Russia, laid the foundations for disarmament and conflict resolution through arbitration rather than war.
Lange Voorhout leads you along this 400-meter historic promenade, lined since the 18th century with noble palaces and diplomatic residences. This 17th-century artery was the scene of secret negotiations that led to the creation of the international arbitration system. The neoclassical facades hide the salons where European and American diplomats debated the future of world peace. Carnegie himself walked these cobblestones during his visits to The Hague, convinced that the grandiose architecture of the government quarter would legitimize his revolutionary project of supranational justice.
The Ridderzaal and Binnenhof immerse you in Dutch governmental history since 1280, the ideological foundation of the Vredespaleis. This Gothic Knights' Hall, used since 1904 for the annual Throne Speech, symbolizes the parliamentary tradition that inspired Carnegie. The Binnenhof complex, seat of the Dutch Parliament since 1815, embodies this democratic governance that the philanthropist wanted to extend worldwide. The Hofvijver, a 5.5-hectare artificial basin created in the 13th century, reflects these institutions in its calm waters, a metaphor for the peace Carnegie dreamed of establishing between nations.
Your investigation concludes between Paleis Noordeinde and Paleistuin, where the monarch's official residence since 1984 dialogues with the 8-hectare public park designed in classical French style. This 16th-century Dutch Renaissance architecture, rebuilt in the 17th-18th centuries, testifies to the institutional stability that seduced Carnegie. 800 meters from the Vredespaleis, this royal palace anchors the pacifist project in European monarchical legitimacy. You leave with an understanding of this Carnegiean vision: transforming The Hague into a laboratory of world peace, where arbitration would definitively replace brute force in international relations.
8 stages through the city
The gameplay: AR, camera, hidden clues
At each stop, open your phone camera: an augmented reality character appears on the façade and speaks your language. Hunt the clue — it materializes as golden letters on the real wall or floats in front of you. When you find it, the phone vibrates, an AR chest opens and reveals your answer fragment. 8 stops, 8 clues to find with the camera, 1 final code.
The stops on your route are a surprise. You'll discover them one by one, guided by your phone, starting from the meeting point.
One phone = one team. Pick the number at checkout (1 to 10).
Solo, or a group sharing the screen. One team, one code.
Family, couple, or 2-3 teams competing. Each phone has its own code and its own score.
Friends, bachelor/bachelorette, small office outing — each their own code, each plays at their own pace. Tiered pricing then €6 flat per phone from the 6th.
Ready to live this adventure?
Get my code · 12€No calendar booking. Code sent immediately by email.
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Delve into the intricacies of international negotiations and hidden documents.
Decipher the symbols and messages carved in the stone of The Hague's iconic buildings.
Follow in the footsteps of great diplomats and philanthropists who shaped international law.
Decipher the legacy of a visionary for world peace.
The fate of nations is in your hands.
OddballTrip combines gamified play, augmented reality and AI. All our competitors deliver 1 or 2 of these angles. We deliver all 5.
A golden chest floats in front of the monument. Tap → opening animation → reveals a secret message.
Point your phone at the façade: a knight, witch, monk, sailor, detective or ghost appears full-screen and speaks to you in your language with their dedicated ElevenLabs voice (each character has their own unique voice) — your living guide.
At the puzzle climax, golden letters magically write themselves on the real wall — that's the puzzle answer. An unforgettable visual effect.
Every puzzle available as text AND voice-over: read at your own pace or listen eyes-free while walking. Great in groups and for accessibility.
A mini-radar shows the target even behind you, and the phone vibrates when you aim in the right direction.
Every puzzle weaves in real historical facts (architecture, era, anecdotes). You learn by playing — like a gamified audioguide.
3 levels of AI-generated help: vibe → where to look → answer format. You're never stuck.
At the end of the game, capture a selfie with OddballTrip banner + mascot, shareable on Instagram, TikTok.
PWA technology: open the link, it plays in your browser. Same quality as an app, no App Store hassle.
No, never. You get a link, you click, it plays in your browser. That's the point of a PWA: same as an app, without the hassle.
GPS yes (handled by your phone). Maps yes (tiles cached). AI and hints need an intermittent 4G connection.
1 h 30 to 2 h 30 depending on your pace. The timer runs but only for the leaderboard — you play at your own tempo.
You get 3 levels of hints per puzzle (increasing penalty). If truly stuck, you can skip the step (45-min penalty but you keep going).
From 12 without an adult, from 6 with an adult reading puzzles. Works for families, couples, friend groups, companies.
Pre-register or contact us — we'll email you as soon as your city is live.
Point your phone at the façade: a historical character appears full-screen and speaks to you in your language. At the puzzle climax, golden letters magically write themselves on the real wall — that's your answer. After each puzzle solved, a treasure chest floats in front of you. Seeing is believing.
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Dive into the most secret diplomatic investigation of 1913, when Andrew Carnegie funded the first international tribunal in History in the heart of The Hague.
1 purchase = 1 phone. Play several on the same device.
No calendar booking. Code sent immediately by email.
🔒Secure payment · Code in 5 min · Free cancellation
🪙+24 TripCoins granted with your booking
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Coupe-file disponibles pour les sites payants de votre parcours. Gagnez du temps, vivez l'aventure pleinement.
12€. Accès exceptionnel aux salles d'audience de la Cour internationale de Justice et à la bibliothèque de 1 million d'ouvrages juridiques.
15€. Toile circulaire de 120 mètres peinte en 1881 par Hendrik Willem Mesdag, plus grand tableau du monde représentant Scheveningen.
8€. Tradition culinaire séculaire dans les étals du port, accompagnée d'oignons crus et de cornichons selon la recette authentique néerlandaise.
35€. Circuit de 45 minutes dans les jardins royaux et le quartier diplomatique à bord d'une réplique des carrosses utilisés par la Reine Wilhelmine.
💡 Réservation optionnelle — vous pouvez aussi acheter sur place. Tous les liens ouvrent dans une nouvelle fenêtre, votre visite OddballTrip reste préservée.